Ultrasound to Facilitate Stone Passage

This study is testing whether focused ultrasound can help push kidney stones through the urinary tract so they pass naturally — without surgery or shockwave lithotripsy. Small kidney stones (2–7 mm) often pass on their own, but they can take weeks and cause significant pain. Researchers are using a specially designed ultrasound device to apply gentle, targeted pulses to the stone, aiming to nudge it along the ureter toward the bladder. The study is for adults who have a confirmed kidney stone and are being managed non-surgically. Some participants also have spinal cord injuries (Phase 2b). The ultrasound procedure is performed in a clinic, and participants are followed to see whether the stone passes faster and with fewer complications compared to standard watchful waiting. You may be eligible if... - You are 18 years or older - You have at least one kidney stone between 2 mm and 7 mm in size confirmed by imaging - You are able to follow up as required - You can read and understand English You may NOT be eligible if... - You are pregnant or trying to become pregnant - You have a solitary kidney - You have an uncorrected bleeding disorder or are on anticoagulants you cannot pause - You have an uncorrected urinary tract obstruction or active infection - You have a calcified abdominal or renal artery aneurysm on the same side as the stone - You have previously had two procedures for the same stone Talk to your doctor to see if this trial is right for you.